WG21 could realistically fix some issues as DRs before S/R is even implemented (and marked stable) anywhere (they have done so before for other features - notably std::format).

Thanks to the C++29 fix you could even remove hacks like `co_yield execution::with_error` as a non-exception-based abort-mechanism inside task.

But ... the problem with symmetric transfer is deeply rooted in the design of std::execution and would require large surgery ...